187 pub struct Compression(u32);  struct
189 impl Compression {  implementation
207     pub const fn new(level: u32) -> Compression {  in new()  argument
208         Compression(level)  in new()
213     pub const fn none() -> Compression {  in none()
214         Compression(0)  in none()
218     pub const fn fast() -> Compression {  in fast()
219         Compression(1)  in fast()
223     pub const fn best() -> Compression {  in best()
224         Compression(9)  in best()
234 impl Default for Compression {  implementation
235     fn default() -> Compression {  in default()
236         Compression(6)  in default()